Red Beads = 1/3 total amount of beads.

1/3 = 24 beads.

1) 24 x 3 = 72 (72 = total number of beads)

2) 72 - 24 = 48 (Subtract the 24 red beads to get the remaining number of beads)

Blue Beads = 2/3 of remainder (48)

1) 48 / 3 = 16 (16 = 1/3)

2) 16 x 2 = 32 (This is 2/3 of 48)

3) 48 - 32 = 16 (This equals the remaining number of beads)

Yellow Beads = 16 (Remaining)